Pipe riveting machine



(No Model.) 2 Sheets-Sheet I. G. CUMMING.

PIPE RIVETING MACHINE.

No. 382,142. Patented May 1, 1888.

1 H.v '583W 2 Sheets-#Sheet 2.

(No Model.)

G. GUMMING., BIBB RIVBTING MACHINE;

No. 382,142.y

Patented May-1, 1888..

w l||| I l ATENT OFFICE.

AGEORGE CUMMING, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO FRANCIS SMITH, OF SAME PLACE.

PIPE-Rivi-:TING MACHINE.

SPECIFICATION. forming part of Letters Patent No. 382,142, dated May 1, 1888.

Application led October 29, i887. Serial No. 253,787. '(No model.)

To all whom t may concern:

Beit known that I, GEORGE CUMMING, of the city and county of SanFrancisco, State of California, have invented an Improvement in Pipe-Riveting Machines; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to machines for riveting tube and pipe sections; audit consists of a mechanism the details of which will be more fully explained by reference to the accompanying drawings, in which- Figure 1 is a general perspective view of the exterior of the apparatus. Fig. 2 is a longitudinal vertical section taken through the hydraulic cylinder. Fig. 3 is a transverse vertical section. Fig. ll-shows the lapping edges of the sheet resting upon the riveting-bar.

Inl making pipe the cylindrical sections are riveted up in short lengths, and these lengths are afterward riveted together to form the long pipe. A

My apparatus is used to rivet the straight seams of the short sections. It consists ot'- a u horizontal bar, A, slightly ilattened upon theupper surface, and this bar is supported from a strong horizontal frame-work, B, made of angle, channel, or I shaped bars of sufficient strength suitably fixed. One end of the bar A is supported from the frame-work D by eyebolts or links C, the upper ends of which pass through the yokes D, and they are adj usted by nuts E to the proper position. These yokes D rest upon the tops of the angle-bars B, which form the supporting-frame, and the eyebolts extend sufficiently below this frame to support the bar A in' a horizontal position and at the proper distance below the frame to enable the riveting apparatus to act in connection with it. The opposite end of the bar A has a similar eyebolt or link, C', the hole at the lower end slipping over the bar A and supporting it after the pipe-section has been placed upon the bar ready for riveting. The bar is thus strongly supported Vand serves as an anvil upon which the rivets are headed up. In order to remove the link or eyebolt C when it is necessary to place a section upon the bar or remove it, the upper end of the link is supported by a transverse shaft or pin, F, which passes through it and has its ends journaled'in boxes G upon the frame B. This allows the lower end of the link or yoke to be swung outward, leaving the end of the barAfrce for the reception or removal of a pipe-section, the bar being held in its horizontal position meantime by the yokes or holding devices C C at the opposite end.

When the pipe section hasbeen placed upon the bar A, the rivets all being in place and projecting through the holes which have previously been punched in the edges of the section, it is necessary to hold the section in place and prevent it from turning or moving out ot' the way. Rivets are placed in all of the holes from one end to the other; but the rivets in the two end holes will not be headed up with the straight seam, these holes remaining until the circular seams are riveted. In uniting the sections together the rivets which are in these holes slip into notches (shown at H) in the collars I, which collars fit upon the bar A, as shown in Fig. 1. The pipe-section being in place, these collars are slipped up, so that the lugs fitting the grooves or notches H will slip over the ends of the pipe-section until the rivets in the end holes lieA in these notches. The collars are then secured to the bar A by means of set or holding screws J. When a single line of riveting is used, no adustment of the collars will be necessary; but when a double line of riveting is used it will be necessary to turn the collars sufficiently to bring the second line of rivets beneath the riveting-machine. The collars therefore have lugs K projecting at one side, these lugs being a sufficient distance apart so that the pin L, which projects from the shaft A, lies between the lugs and acts asastop,onelug lying against the pin when one row of rivets is being headed up, after which, the set-screws being loosened, the collars I are turned around ICO the top of the frame B, so that the hydraulic cylinder may be moved along above the riveting-bar A and the pipe which is supported upon it for the purpose of heading the rivets.

The piston N is forced down by water under pressure, which is admitted through a pipe, S, as plainly shown in Fig. 3. Connected with this piston is a stem,T,which extends upward into the upper part or smaller cylinder,having within it a piston, U, with which the stem T connects. A pipe, V, leads water under pressure into the smaller cylinder beneath the piston U, and the tendency of this pressure is to raise the pistons and with them the plunger M. This will occur whenever the pressure is taken off of the larger piston, and whenever lwater is admitted above the piston N the greater area causes it to overcome the pressure upon the piston U, and thus force the riveting-plunger M down with sufficient force to head the rivet. A jointed `flexible or other pipe is employed to allow the cylinder to travel back and forward. l

The admission of water into the space above the larger piston, N, is controlled by a threeway cock, W, and this is operated by a crankarm, X, and a hand-lever, Y, so that by the movement of the lever water may be admitted to force the plunger down and afterward allow it to escape, so that the smaller piston will act to raise it again.

The shaft Z, upon which the lever Y is secured, `extends across the carriage Q, from which the hydraulic cylinder is suspended ,and is journaled thereon. At the opposite end of this shaft is a short crank-arm, a, having a pawl, b, pivoted to it. This pawl engages the teeth c of a rack formed upon or secured to the upper part of the frame B, upon which the riveting-cylinder travels, and whenever t-he lever Y is moved so as to allow the rivetingplunger to be raised its action will, through the pawl b, advance the carriage and the hydraulic cylinder, so that the plunger will stand above the next rivet, the teeth in the` rack being placed to correspond with the distance between the rivet-holes in the pipe-sections.

-It will be manifest that a screw, weighted arm or pawl, or other mechanical device may be employed in place of the pawland ratchet here described without essentially changing the character of my invention.v

After the straight seams have been riveted the set-screws .I may be loosened and the collars I moved backward, so as to release the pipe, and by turning the suspending-yoke C backward the end of the bar A will be left free, and the pipe-section, slipping over the outer collar and the end of the bar, may be taken off. Another pipesection is placed upon the bar, the yoke C swung into place to support the bar, which thus forms the anvil upon which the rivets are headed,and the work will go on.

By this mechanism pipe-sections may be very rapidly riveted up with the least amount of handling, and by means of the movable or traveling hydraulic cylinder, with its plunger and the automatic mechanism for advancing 7o it, the work is very rapidly completed.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The horizontal riveting bar or anvil having its ends suspended beneath the track or frame, in combination with the traveling riveting-plunger, substantially as herein described.

2. The horizontal riveting bar or anvil having one end fixed or suspended, as shown, in combination with a swinging supporting link or yoke at the opposite end, substantially as herein described.

3. The horizontal riveting bar or anvil having one end suspended in xed supports and the other with the swinging or movable support, in combination with t-he notched or grooved collars, with the set-screws, whereby the pipe-section is held in position for yriveting, substantially as herein described.

4. The collars fitting the riveting bar or riveting double seams, substantially as hereinV described. f

5. The horizontal riveting bar or anvil with its holding-collars, and the frame beneath which the bar is supported, in combination with the hydraulic cylinder, the verticallymoving plunger, the Water-supply pipes, and the three-way cock or valve whereby the pistons and riveting-plunger are actuated, substantially as herein described.

6. The horizontal riveting bar or anvil with its Xed and swinging supports, and the pipeholding collars, in combination with the hydraulic cylinder and rivetingplunger, the traveling carriage from which the cylinder is suspended, and the feed mechanism fwhereby the carriage and cylinder are advanced a distance equal to that between the rivet-holes in the pipe, substantially as herein described.

7. The hydraulic riveting cylinder supported from the traveling carriage upon the main frame, the pipes supplying water to the pistons within the cylinder, and the three-way.

GEORGE CUMMING.

Witnesses:

S. H. NoURsE, H. C. LEE.

IOO

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